Doreys from Montbeliard(Nova Scotia)

I am looking for information farther back than I have to date and am not sure where to start. My ggg grandfather was William Dorey (born 1827) and was from the Hubbards area in Nova Scotia. He is the last one I can find information on. He married Lucy Smith Dorey (I think she was from Hammonds Plains area).My grandmother gave me the preceding info and from that I believe I found he and lucy through an 1876 Census of Lunenburg county.I only knew of the one son (Thomas, who was my gg grandfather), but from the census I have determined that William and Lucy had 6 children (although there is a gap of 10 yrs between Thomas and Susan, so I suspect that maybe some children had died). Their children: